Computational aerodynamics of long segment congenital tracheal stenosis with bridging bronchus

Limin Zhu; Jinlong Liu; Weimin Zhang; Qi Sun; Haifa Hong; Zhou Du; Jinfen Liu; Yi Qian; Qian Wang; Mitsuo Umezu

doi:10.1109/ASCC.2015.7244879

Computational aerodynamics of long segment congenital tracheal stenosis with bridging bronchus

Limin Zhu, Jinlong Liu, Weimin Zhang, Qi Sun, Haifa Hong, Zhou Du, Jinfen Liu^*, Yi Qian, Qian Wang, Mitsuo Umezu

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

4 Citations (Scopus)

Abstract

Long segment congenital tracheal stenosis (LSCTS) is one of most severe malformation with high mortality rate and dismal prospective. Hypoventilation is the main issue for the death of children with LSCTS after surgical correction. However, currently, little information is available on local aerodynamics to disclose the reasons for the improvement of such therapies, especially LSCTS with distal bronchus stenoses. Here, we investigated a patient-specific model of LSCTS with complete tracheal rings and bridging bronchus (BB). Computational fluid dynamics (CFD) was applied to analyze the local aerodynamics around BB before and after tracheal surgery in inspiratory phase and expiratory phase. Average pressure drop, wall shear stress, streamlines and energy loss were calculated to evaluate the surgical outcomes. The results indicate the airflow at the trachea and BB become more turbulent in expiration phase than that in inspiration phase. The turbulence increases the workloads of respiration in expiration phase. It should be the cause for postoperative hypoventilation. To study the local aerodynamics is helpful for the improvement of surgical therapies of the LSCTS.

Original language	English
Title of host publication	2015 10th Asian Control Conference: Emerging Control Techniques for a Sustainable World, ASCC 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Print)	9781479978625
DOIs	https://doi.org/10.1109/ASCC.2015.7244879
Publication status	Published - 2015 Sept 8
Event	10th Asian Control Conference, ASCC 2015 - Kota Kinabalu, Malaysia Duration: 2015 May 31 → 2015 Jun 3

Other

Other	10th Asian Control Conference, ASCC 2015
Country/Territory	Malaysia
City	Kota Kinabalu
Period	15/5/31 → 15/6/3

Keywords

aerodynamics
airflow
bridging bronchus
computational fluid dynamics
congenital tracheal stenosis

ASJC Scopus subject areas

Control and Systems Engineering

Access to Document

10.1109/ASCC.2015.7244879

Cite this

Zhu, L., Liu, J., Zhang, W., Sun, Q., Hong, H., Du, Z., Liu, J., Qian, Y., Wang, Q., & Umezu, M. (2015). Computational aerodynamics of long segment congenital tracheal stenosis with bridging bronchus. In 2015 10th Asian Control Conference: Emerging Control Techniques for a Sustainable World, ASCC 2015 [7244879] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ASCC.2015.7244879

Computational aerodynamics of long segment congenital tracheal stenosis with bridging bronchus. / Zhu, Limin; Liu, Jinlong; Zhang, Weimin et al.
2015 10th Asian Control Conference: Emerging Control Techniques for a Sustainable World, ASCC 2015. Institute of Electrical and Electronics Engineers Inc., 2015. 7244879.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Zhu, L, Liu, J, Zhang, W, Sun, Q, Hong, H, Du, Z, Liu, J, Qian, Y, Wang, Q & Umezu, M 2015, Computational aerodynamics of long segment congenital tracheal stenosis with bridging bronchus. in 2015 10th Asian Control Conference: Emerging Control Techniques for a Sustainable World, ASCC 2015., 7244879, Institute of Electrical and Electronics Engineers Inc., 10th Asian Control Conference, ASCC 2015, Kota Kinabalu, Malaysia, 15/5/31. https://doi.org/10.1109/ASCC.2015.7244879

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abstract = "Long segment congenital tracheal stenosis (LSCTS) is one of most severe malformation with high mortality rate and dismal prospective. Hypoventilation is the main issue for the death of children with LSCTS after surgical correction. However, currently, little information is available on local aerodynamics to disclose the reasons for the improvement of such therapies, especially LSCTS with distal bronchus stenoses. Here, we investigated a patient-specific model of LSCTS with complete tracheal rings and bridging bronchus (BB). Computational fluid dynamics (CFD) was applied to analyze the local aerodynamics around BB before and after tracheal surgery in inspiratory phase and expiratory phase. Average pressure drop, wall shear stress, streamlines and energy loss were calculated to evaluate the surgical outcomes. The results indicate the airflow at the trachea and BB become more turbulent in expiration phase than that in inspiration phase. The turbulence increases the workloads of respiration in expiration phase. It should be the cause for postoperative hypoventilation. To study the local aerodynamics is helpful for the improvement of surgical therapies of the LSCTS.",

keywords = "aerodynamics, airflow, bridging bronchus, computational fluid dynamics, congenital tracheal stenosis",

author = "Limin Zhu and Jinlong Liu and Weimin Zhang and Qi Sun and Haifa Hong and Zhou Du and Jinfen Liu and Yi Qian and Qian Wang and Mitsuo Umezu",

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AU - Zhu, Limin

AU - Liu, Jinlong

AU - Zhang, Weimin

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AU - Umezu, Mitsuo

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N2 - Long segment congenital tracheal stenosis (LSCTS) is one of most severe malformation with high mortality rate and dismal prospective. Hypoventilation is the main issue for the death of children with LSCTS after surgical correction. However, currently, little information is available on local aerodynamics to disclose the reasons for the improvement of such therapies, especially LSCTS with distal bronchus stenoses. Here, we investigated a patient-specific model of LSCTS with complete tracheal rings and bridging bronchus (BB). Computational fluid dynamics (CFD) was applied to analyze the local aerodynamics around BB before and after tracheal surgery in inspiratory phase and expiratory phase. Average pressure drop, wall shear stress, streamlines and energy loss were calculated to evaluate the surgical outcomes. The results indicate the airflow at the trachea and BB become more turbulent in expiration phase than that in inspiration phase. The turbulence increases the workloads of respiration in expiration phase. It should be the cause for postoperative hypoventilation. To study the local aerodynamics is helpful for the improvement of surgical therapies of the LSCTS.

AB - Long segment congenital tracheal stenosis (LSCTS) is one of most severe malformation with high mortality rate and dismal prospective. Hypoventilation is the main issue for the death of children with LSCTS after surgical correction. However, currently, little information is available on local aerodynamics to disclose the reasons for the improvement of such therapies, especially LSCTS with distal bronchus stenoses. Here, we investigated a patient-specific model of LSCTS with complete tracheal rings and bridging bronchus (BB). Computational fluid dynamics (CFD) was applied to analyze the local aerodynamics around BB before and after tracheal surgery in inspiratory phase and expiratory phase. Average pressure drop, wall shear stress, streamlines and energy loss were calculated to evaluate the surgical outcomes. The results indicate the airflow at the trachea and BB become more turbulent in expiration phase than that in inspiration phase. The turbulence increases the workloads of respiration in expiration phase. It should be the cause for postoperative hypoventilation. To study the local aerodynamics is helpful for the improvement of surgical therapies of the LSCTS.

KW - aerodynamics

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Computational aerodynamics of long segment congenital tracheal stenosis with bridging bronchus

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